Invasion

Invasion Description

1st Record: WA-OR/Columbia River estuary (1999, Toft et al. 2002; Sytsma et al. 2004)

Geographic Extent

WA-OR/Columbia River estuary (1999, Toft et al. 2002; Sytsma et al. 2004); Columbia Slough, Incendiary Bridge [45.6106, -122.7553] Samples: 51-WR-02, 52-WR-02, 01-WR-02, Dates: April 16, 2002, June 24, 2002 (Systma et al. 2004); Sauvie Island - Gilbert River Boat Ramp [45.7916, -122.7996] Samples: 07-WR-02, Dates: June 26, 2002 (Systma et al. 2004); Russian Island [46.1932, -123.6131] Samples: 14-ES-02, Dates: June 28, 2002 (Systma et al. 2004); WA/Martin Slough (1999, Wilson and Partridge 1999)